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Sub-Sector Capital and famous Garden World


Ultima Segmentum


Australis Ultima


Centrumeh Sub-Sector


Centrumeh Gate


Garden World



Westarnes Map.jpg


Type Large Iron/silicate

Mass 7.73 x 1024 kg

Density 5.15 g/cm3

Composition 35.7% iron, 27.8% silicon, 24.6% oxygen, 5.4% aluminum, 3.7% other metals, 2.8% other elements


Gravity 10.18 m/s2

Escape Velocity 12.03 km/s

Rotation Period 34.76 hours

Axis Tilt 30.39 °


Type Dense breathable

Pressure 131.36 kPa

Composition 79.3% argon, 20.7% oxygen, trace other gases

A relatively neutral world with very few natural resources and not especially fertile for extensive Agricultural purposes but still lending itself to plant growth with a thick argon rich atmosphere and nutrient rich soils


Being the Sub-Sectors capital planet and a relatively newly 'created' world a large section of the population would be considered upper echelons by most other worlds standards; minor nobility, senior administrators, people of import and other sycophants. Of course there are the menials, servants, gardeners (oh so many gardeners), defence force and a number of other required roles, but the middle class is missing. There is no established society which evolved on the planet over the millennia, no native population or other civilian presence. It is a governing world full of government staff.



Westarnes was never a significant planet before Compliance; with the establishment of the Mechanicum on Sudeen it received limited attention with a small colony of farmers and agri bots to ensure the supply of food to the system but there was never a native population that was recorded. Overlooked due to the lack of mineral and other raw resources, there was no need to establish a significant mining operation and with little desire for expansion the conclave on Sudeen saw no need to establish a Hive or even a larger colony on the world.


Like Sudeen, Westarnes was initially scouted by the Imperial surveillance ships and deemed to be insignificant in any Compliance operation, however unlike the Forge World it proved to be correct. Without any military presence and very little tactical value in the war of Compliance the planet was left alone and undamaged during the brief conflict.

Post Compliance

Having negotiated the surrender of the Mechanicum conclave on Sudeen ownership of both Raynes and Westarnes was transferred to Imperial hands. With the damage done to the Knight World it was decided that the former Agri World would become the new seat of government for the entire Sub-Sector. The strategic importance of the System within the Sub-Sector was for the System as a whole, not an individual planet, in addition, being able to leverage the other Systems to supply the new Capital with food and tithes allowed the new Governor a lot of flexibility in the choice of location.

While not being a prime candidate for extensive food harvesting, the world still lent itself to plant growth and thus the idea of creating a monumental Garden World was formed. Converting entire continents into manicured gardens, vast estates and forests commenced immediately and for the next five decades, with the begrudging assistance of Sudeen and powerful terraforming machines, the surface of the world was transformed. A handful of carefully planned Hives were constructed and strict population control limits were put into place, the building boundaries clearly defined and no further expansion would be granted. Extensive diplomatic retreats were scattered throughout the new paradise, places to hold meetings and negotiations amidst the beauty of an unspoiled world.

The new capital was born and while there had been mutterings of dissent from numerous System governors about the costs involved, none were able to deny its magnificence upon its completion. To further quell any resentment about the appointment of the Capital, Migeal Westarnes (adopted name after being named Governor) proved to be an exceptional administrator and leader. Able to resolve problems amongst his system governors and negotiate favorable outcomes with trade delegations from neighboring Sub-Sectors quickly won him favor amongst the Subs nobility. Considered a fair but shrewd governor Migeal led Centrumeh from being a gathering of frontier Systems to a rapidly expanding trade empire which wielded considerable political power on the Sector stage.

The coming of the Horus Heresy was a significant blow to Migeal and his fledgling Sub, such a significant and unforeseen turn in events cost him billions in lost trade revenue as supply routes were severed by war and worse as his Systems began feeling the impacts of civil war. First the Trugoy System and then the Oteal System exploded into conflict, with both falling to the forces of the Warmaster. The pressure and imminent spread of fighting looked sure to spill over into the Centrumeh Gate and desperate to maintain the peace for as long as possible it is believed that the governor may have influenced House Horne to declare a Hastilude and invoke Treuga Nobiles, the Truce of Nobles.

With the Truce in place and both forces hesitant to break such an age old cease fire, it appears that Migeal has indeed worked another miracle and saved his System from war, but for how long?

Campaign Reports

Breaking of Centrumeh Gate
Breaking Ribbon.jpg

Prelude to War

While a number of Houses and at least one Company are known to have ..→

Battle Reports

Battle Name Date Planet Battle Outcome Battle Summary
Breaking of Centrumeh Gate~Ep.1 - ACT of Heresy: Westarnes 058.009.M31 Westarnes Traitor

Being the seat of the Imperial presence in the System and the governing force of the entire Sub-Sector, Westarnes should have been a bastion of strength and the central core of any defensive ..→

Breaking of Centrumeh Gate~Ep.3 - Aotearoa Faction 153.009.M31 Westarnes Unresolved

Westarnes, is a garden world with half a dozen strictly controlled hives, it is the seat of government for the entire Sub-Sector but it lacks a significant military, always assuming the outer ..→

Skirmish Reports

  • L-XVII-8144 fought L-XIII-1313 resulting in a standoff.
  • L-XVI-2941 defeated I-ARMY-8733 a Traitor gain.
  • L-XVI-2941 fought L-XIX-0437 resulting in a standoff.
  • A-MECH-8213 defeated L-XVI-2941 a Loyalist gain.
  • L-XVII-8144 fought A-MECH-8213 resulting in a standoff.
  • L-XVI-2941 fought L-X-9504 resulting in a standoff.
  • L-IV-1219 defeated L-XVI-2941 a Secessionist gain.
  • L-XVII-8144 defeated L-X-9504 a Traitor gain.
  • L-XVII-8144 defeated L-XIX-0437 a Traitor gain.
  • L-XVII-8144 defeated L-IV-1219 a Traitor gain.
  • L-XVII-8144 fought L-X-9504 resulting in a standoff.
  • L-XVII-8144 fought A-MECH-8213 resulting in a standoff.
  • L-XVI-2941 fought L-X-9504 resulting in a standoff.
  • L-XVI-2941 fought A-MECH-8213 resulting in a standoff.
  • L-VIII-0381 defeated L-XIII-5044 a Traitor gain.
  • L-VIII-0381 defeated L-XVIII-2139 a Traitor gain.
  • L-XVI-1564 defeated L-XIII-5044 a Traitor gain.
  • L-XVI-1564 defeated L-XVIII-2139 a Traitor gain.
  • L-VIII-0381 defeated I-ARMY-8733 a Traitor gain.
  • I-ARMY-8733 defeated L-XVI-1564 a Loyalist gain.